Computing-calendar.



E. N. mmzi 4COMPUUNG CALENDAR.

APPLQCATWN FILED OCT. 2. 1915.

\ Patented Feb. 1S, 1919.

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fggy/i EDWARD N. HEINZ, OF CHICAGO, ILLINOIS.

COMPUTING-CALENDAR.

Specification of Letters Patent.

Iatented Feb. 18, 1919.

Application led October 27, 1915. Serial No. 58,091.

f tcrest and discounts.

It often happens in banking and other institutions that it is necessary to determine quickly and accurately the number of days from a specific day to some date in the future, and also to determine a date which occurs a given number of days after a speciiic date.

It is the object of my invention to produce a simple, accurate, and economical device for accomplishing the above result` and also to indicate 'which days are holidays and which days occur at the end of periods of a predetermined number of days after a speciic date. In connection with the latter computation the usual period is thirty days, or multiples thereof.

These and other advantages of my invention will be more readily understood by reference to 'the accompanying drawing, which shows a preferred embodiment of my invention, and in which the ligure is a perspective of my improved computing cal,- endar. A

The base or stand 10 is provided with a pair of U-shaped guides 11, which are fastened to the base 10 by means of screws or nuts, so that the guides are readily removable according to the well-known practice in devices of' this character. The calendar pad itself consists of a plurality of sheetsj12, through the perforations 13 of which the U-shaped guides 11 extend. As'

clearly indicated in the drawing, the sheets may be turned from .one side to the other of the U-shaped guides 11, and in any given position of the sheets a pair of pages, as, for example,14 and 15, are exposed to view. A pair of pages is provided for each day of the year, and in the drawing I have indi-l cated the pair7of pages for Saturday, July 1,1916.

.July 1, and a second As will readily be apparent, von the lefthand page 141 is indicated the day of the week Satf the day of the month 1, the month July, and the year 1916. On the page 14 is alsoprovided a chart 16, which indicates the date of each day of the month of July, these dates being indicated by the relatively large sized numbers 17, a square 18 of the chart 16 being provided for each day, according to the well-known system. The relatively small numbers 19 (which are preferably printed in a different color from the numbers 17) indicate the number of days intervening between the specific day, namely.

indicating at a glance that this date is that of a holiday. In connect-ion with the determination of interest dates it is often desirable to know at a glance the date which occurs 8O days after a specific date, and for this reason Iemploy arbitrary marks, which, in the present embodiment, consists of shading, 21, 4to quickly indicate the date occurring 30 days after the speciiic day. In the present instance this date is July 31, which occurs 30 days after July 1.

On the second page, 15, of the pair of pages I employ a series of charts 22, 23, 21, 25, 26 and 27, these charts in the present instance corresponding to the months of August, September, October, November and December of 1916, and January 4of 1917. Each chart of this series corresponds in principle to the chart 16 shown on the page 14. The relatively large numerals 17a indi? with the chart 16) indicate the number of days intervening between the specific date,

iven date.- For example, it will be'lfevi ent by referring to vthe drawing that the number of days inter7 vening between July 1 and September 21 is 82 days as indicated h the small numeral.

the round dot 202l occurring in the square 18*L corresponding to the date of the holiday, and every date which occurs as the last day of periods which are multiples or" thirty days after July 1 is indicated hy the shading` 51. parent that these dates which occur 60, 90, 120, 150, 180 andl210 days after July 1 are August 30, September Q9, October 3G, No-

vember Q8, December 2,8, and January 27,-

respectively. lt will he apparent that in the charts which I employ not only is the day of the month indicated in each case, but the day ot' the Week is also readily determined by the usual system "employed in monthly calendars,

i have descrihed in detail the "various data which 'occur in connection with the date Sat July l, 1916. For any other date of the year the charts are correspondingly varied, in the manner which 'will be readily understood. lhe manner of ascertaining dates subsequent to the date indicated on the left hand or tiret lsheet of the exposed pair is as follows: The small numerals 19 are arranged for every date Iin the same manner as arranged for the date shown in the drawing, namely, Saturday July 1, 1916. lf, for instance, the left hand sheet 14 were lshown opened to Thursday July 20, 1916,

then referring to the chart lf3 the numeral 1 ot the series 1S? would he under the date of July 21 and the numeral 2 of the series would he under date of July 22, etc., these small numerals lf) following consecutively throughout the remaining days oi the month oi July and the six succeeding,r months as shown. on the .sheet 15 of the pair. The indications for 'inflidi-.ys and the last days of periods of Fl() days and multiples thereof are made according to exactly the same principle described ahove.

lt will he a|i|mrent that many changes could he made in the detailed construction and arrangement of the various parts which l have described without departing from ln theifgure it will be ap-v the spirit or scope of my invention, as defined in the appended claims.

lVhat I claim is:

1. A calendar comprising a plurality of sheets, one sheet for each day of the ear, the hack of each sheet and the front ciL the next succeeding' sheet having thereon a 60 chronological succession of standard month calendar charts having indicia of the days of the Week, the days of the month and holidays, there being associated with the lirst and the trent of the next succeeding sheet.

2. A calendar comprising a plurality 0i' sheets, one sheet for each day of the year, the hack of each sheet lseing 'provided with 80 astandard calendar chart having, indiciaof the days of the week, the days of the month and holidays, the front of the next succeeding sheet containing a chronological succession of standard month calendar charts next l succeeding the chart on the-hack of the preceding sheet and having indicia of the days of the week the days of the month and' holidays, the back of each sheet also having indicia of the predetermined day of the month, each da y date ot each-calendar hart, A subsequent to the predetermined day c,l'..the. month, having associated therewith a. number indicating the days said day date is suhsequentrto sai-:l predetermined day date, and B6 said sheets-heing`loosely assembled onennonf; the other in chronolog d order, w zcrehy the lsheets may he individually and collectively inverted und displaced to simultaneouslyv display the hack of any` one sheet and the front 'et the next succeiding sheet.

In witness whereof l hereunto suhscrflm my name this 25th day ot October, ."x. l). 1915. l

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